title: Theoretical modeling of fiber laser at 810 nm based on thulium-doped silica fibers with enhanced 3H4 level lifetime.
abstract: A compact upconversion fiber laser operating around 810 nm is proposed using thulium-doped silica-based fiber with locally modified thulium environment by high alumina codoping. Using a comprehensive numerical model of thulium doped fiber we investigate performance of the proposed laser. Comparison with two other thulium hosts, fluoride glass and standard silica, is presented. Efficient lasing can be expected even for silica based fiber for specific ranges of the fiber and laser cavity parameters, especially when 3H4 lifetime is enhanced. With moderate pump power of 5 W at wavelength of 1064 nm, the predicted output power of the upconversion laser is about 2 W at 810 nm.
authors.affiliation: Institute of Photonics and Electronics ASCR, vvi, 18251 Prague, Czech Republic. peterka@ufe.cz
authors.forename: Pavel
authors.initials: P
authors.lastname: Peterka
authors.forename: Ivan
authors.initials: I
authors.lastname: Kasik
authors.forename: Anirban
authors.initials: A
authors.lastname: Dhar
authors.forename: Bernard
authors.initials: B
authors.lastname: Dussardier
authors.forename: Wilfried
authors.initials: W
authors.lastname: Blanc
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D008962:Models, Theoretical; D013932:Thulium / Q000737:chemistry*
chemical_list: D013932:Thulium